Riverside County firefighters were battling a fire in an abandoned date grove in Thermal Monday afternoon, fire officials said.

The fire, which was reported around 2 p.m., had burned between five and seven acres of "heavy fuels" as of 4:30 p.m. Officials said 50 firefighters were on scene on the 56-900 block of Jackson Street.

One firefighter has been transported to a nearby hospital for non-life threatening injuries.

California Highway Patrol officers also responded to the blaze to assist with traffic control. As of 3 p.m., the CHP had closed the north and southbound lanes of Jackson Street near 58th Avenue because the fire was burning on both sides of the road.